diff options
Diffstat (limited to 'cores/arduino')
| -rw-r--r-- | cores/arduino/USBCore.cpp | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/cores/arduino/USBCore.cpp b/cores/arduino/USBCore.cpp index d3e0170..76ceb01 100644 --- a/cores/arduino/USBCore.cpp +++ b/cores/arduino/USBCore.cpp @@ -290,9 +290,12 @@ int USB_Send(u8 ep, const void* d, int len) if (n > len) n = len; - len -= n; { LockEP lock(ep); + // Frame may have been released by the SOF interrupt handler + if (!ReadWriteAllowed()) + continue; + len -= n; if (ep & TRANSFER_ZERO) { while (n--) |